Health monitoring of a railway bridge by fiber optic sensor (SOFO)

Y. Kawano, T. Mikami, F. Katsuki

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

In recent years, the number of old concrete bridges has remarkably increased in Japan. A periodic monitoring of them is necessary in order to confirm their security. This monitoring can lead to early warnings and prediction of potential problems and helps in the planning of the necessary maintenance interventions and enables the damage assessment after earthquakes. In many concrete bridges, the deformations are the most relevant parameter to be monitored in both short and long-terms. A degradation of the building materials has an influence on both the static and dynamic behaviors of the bridges and can be detected by deformation sensors. Conventional strain gages give only local information about the material behavior. A complete understanding of the structure's behavior requires the measurement of deformation based on long-gage sensors. Therefore, a long-gage-length fiber optic sensor system, SOFO is suitable for health monitoring of the large-scale structures such as bridges. The SOFO V system allows the measurement of deformation with a resolution of a few micrometers and an excellent long-term stability. The SOFO Dynamic system allows the measurement of dynamic deformation (0 to 1kHz) with a resolution of a 0.01 micrometers. We applied SOFO Dynamic system to a reinforced concrete railway bridge focusing on its dynamic behavior. Prior to the test on the bridge, some element tests were conducted in a laboratory. In this paper, we describe about both the element test results and the field test results.

本文言語English
ホスト出版物のタイトルProceedings of the 5th European Workshop - Structural Health Monitoring 2010
ページ1319-1324
ページ数6
出版ステータスPublished - 2010 12 1
イベント5th European Workshop on Structural Health Monitoring 2010 - Naples, Italy
継続期間: 2010 6 282010 7 4

出版物シリーズ

名前Proceedings of the 5th European Workshop - Structural Health Monitoring 2010

Conference

Conference5th European Workshop on Structural Health Monitoring 2010
国/地域Italy
CityNaples
Period10/6/2810/7/4

ASJC Scopus subject areas

  • 土木構造工学
  • 安全性、リスク、信頼性、品質管理

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